<template>
  <div style="padding: 10px">
    <!--    功能区域-->
    <div style="margin: 10px 0">
      <el-button type="primary" @click="add">新增</el-button>
    </div>

    <!--    搜索区域-->
    <div style="margin: 10px 0">
      <el-input v-model="search" placeholder="请输入关键字" style="width: 20%" clearable></el-input>
      <el-button type="primary" style="margin-left: 5px" @click="load">查询</el-button>
    </div>
    <el-table :data="tableData" border stripe style="width: 100%; margin: 10px 0">
      <el-table-column prop="id" label="ID" sortable=""></el-table-column>
      <el-table-column prop="name" label="名称"></el-table-column>
      <el-table-column prop="price" label="单价"></el-table-column>
      <el-table-column prop="author" label="作者"></el-table-column>
      <el-table-column prop="createTime" label="出版时间"></el-table-column>
      <el-table-column label="封面">
        <template #default="scope">
          <el-image
              style="width: 100px; height: 100px"
              :src="scope.row.cover"
              :preview-src-list="[scope.row.cover]"
              :preview-teleported="true">
          </el-image>
          <!-- preview-teleported="true" 解决图片穿模问题 -->
        </template>
      </el-table-column>
      <el-table-column fixed="right" label="操作" width="200px">
        <template #default="scope">
          <el-button type="primary" @click="handleEdit(scope.row)">编辑</el-button>
          <el-popconfirm title="您确定要删除吗?" @confirm="handleDelete(scope.row.id)">
            <template #reference>
              <el-button size="mini" type="danger">删除</el-button>
            </template>
          </el-popconfirm>
        </template>
      </el-table-column>
    </el-table>

    <div style="margin: 10px 0">
      <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="currentPage"
          :page-sizes="[5, 10, 20]"
          :page-size="pageSize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total">
      </el-pagination>

      <el-dialog title="提示" v-model="dialogVisible" width="30%">
        <el-form :model="form" label-width="120px">
          <el-form-item label="名称">
            <el-input v-model="form.name" style="width: 80%"></el-input>
          </el-form-item>
          <el-form-item label="价格">
            <el-input v-model="form.price" style="width: 80%"></el-input>
          </el-form-item>
          <el-form-item label="作者">
            <el-input v-model="form.author" style="width: 80%"></el-input>
          </el-form-item>
          <el-form-item label="出版时间">
            <el-date-picker @input="$forceUpdate()" v-model="form.createTime" value-format="yyyy-MM-dd" type="date" style="width: 75%">          </el-form-item>
          <el-form-item label="封面">
              <el-upload ref="upload" action="http://localhost:9090/files/upload" :on-success="filesUploadSuccess">
                <el-button type="primary">点击上传</el-button>
              </el-upload>
          </el-form-item>
        </el-form>
        <template #footer>
          <span class="dialog-footer">
            <el-button @click="dialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="save">确 定</el-button>
          </span>
        </template>
      </el-dialog>

    </div>
  </div>
</template>

<script>


import request from "@/utils/request";

export default {
  name: 'Book',
  components: {

  },
  data() {
    return {
      form: {},
      dialogVisible: false,
      search: '',
      currentPage: 1,
      pageSize: 10,
      total: 0,
      tableData: []
    }
  },
  created() {
    this.load();
  },
  methods: {
    load() {
      this.loading = true
      request.get("/book", {
        params: {
          pageNum: this.currentPage,
          pageSize: this.pageSize,
          search: this.search,
        }
      }).then(res => {
        this.loading = false;
        this.tableData = res.data.records;
        this.total = res.data.total;
      })
    },
    add() {
      this.dialogVisible = true;
      this.form = {};
      if (this.$refs['upload']){
        this.$refs['upload'].clearFiles();  //清除历史文件列表
      }
    },
    save() {
      if (this.form.id) {  // 更新
        request.put("/book", this.form).then(res => {
          console.log(res)
          if (res.code === '0') {
            this.$message({
              type: "success",
              message: "更新成功"
            })
          } else {
            this.$message({
              type: "error",
              message: res.msg
            })
          }
          this.load() // 刷新表格的数据
          this.dialogVisible = false  // 关闭弹窗
        })
      }  else {  // 新增
        request.post("/book", this.form).then(res => {
          console.log(res)
          if (res.code === '0') {
            this.$message({
              type: "success",
              message: "新增成功"
            })
          } else {
            this.$message({
              type: "error",
              message: res.msg
            })
          }
          this.load() // 刷新表格的数据
          this.dialogVisible = false  // 关闭弹窗
        })
      }
    },
    filesUploadSuccess(res){
      console.log(res);
      this.form.cover = res.data;
    },
    handleEdit(row) {
      this.form = JSON.parse(JSON.stringify(row));
      this.dialogVisible = true;
      //由于vue是异步加载,因此在首次编辑时,form表单尚未加载过,clearFiles is not defined
      this.$nextTick(() => {
        if (this.$refs['upload']){
          this.$refs['upload'].clearFiles();  //清除历史文件列表
        }
      })
    },
    handleDelete(id) {
      console.log(id)
      request.delete("/book/" + id).then(res => {
        if (res.code === '0') {
          this.$message({
            type: "success",
            message: "删除成功"
          })
        } else {
          this.$message({
            type: "error",
            message: res.msg
          })
        }
        this.load();  // 删除之后重新加载表格的数据
      })
    },
    handleSizeChange(){ //改变当前每页个数
      this.load();
    },
    handleCurrentChange(){  //改变当前所在页码
      this.load();
    },
  }
}
</script>
